<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.8.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>132</ContextCount>
  <ElementCount>200</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>45</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>7</UnitCount>
  <MyReports>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - Consolidated Condensed Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/StatementConsolidatedCondensedBalanceSheets</Role>
      <ShortName>Consolidated Condensed Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - Consolidated Condensed Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/StatementConsolidatedCondensedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Condensed Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - Consolidated Condensed Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/StatementConsolidatedCondensedStatementsOfOperations</Role>
      <ShortName>Consolidated Condensed Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00300 - Statement - Consolidated Condensed Statements Of Comprehensive Income (Loss)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/StatementConsolidatedCondensedStatementsOfComprehensiveIncomeLoss</Role>
      <ShortName>Consolidated Condensed Statements Of Comprehensive Income (Loss)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00305 - Statement - Consolidated Condensed Statements Of Comprehensive Income (Loss) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/StatementConsolidatedCondensedStatementsOfComprehensiveIncomeLossParenthetical</Role>
      <ShortName>Consolidated Condensed Statements Of Comprehensive Income (Loss) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00500 - Statement - Consolidated Condensed Statements Of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/StatementConsolidatedCondensedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Condensed Statements Of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10101 - Disclosure - General</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureGeneral</Role>
      <ShortName>General</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10201 - Disclosure - New Accounting Pronouncements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureNewAccountingPronouncements</Role>
      <ShortName>New Accounting Pronouncements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Discontinued Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureDiscontinuedOperations</Role>
      <ShortName>Discontinued Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10401 - Disclosure - Segment Reporting</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureSegmentReporting</Role>
      <ShortName>Segment Reporting</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Geographic Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureGeographicInformation</Role>
      <ShortName>Geographic Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10601 - Disclosure - Inventories</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureInventories</Role>
      <ShortName>Inventories</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Short And Long-Term Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureShortAndLongTermDebt</Role>
      <ShortName>Short And Long-Term Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>10901 - Disclosure - Shareholders' Equity And Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureShareholdersEquityAndStockBasedCompensation</Role>
      <ShortName>Shareholders' Equity And Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Income (Loss) Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureIncomeLossPerShare</Role>
      <ShortName>Income (Loss) Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Legal Proceedings</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureLegalProceedings</Role>
      <ShortName>Legal Proceedings</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Related-Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureRelatedPartyTransactions</Role>
      <ShortName>Related-Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Revenue By Market</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureRevenueByMarket</Role>
      <ShortName>Revenue By Market</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>20202 - Disclosure - New Accounting Pronouncements (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureNewAccountingPronouncementsPolicies</Role>
      <ShortName>New Accounting Pronouncements (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureNewAccountingPronouncements</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>30303 - Disclosure - Discontinued Operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureDiscontinuedOperationsTables</Role>
      <ShortName>Discontinued Operations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureDiscontinuedOperations</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>30403 - Disclosure - Segment Reporting (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureSegmentReportingTables</Role>
      <ShortName>Segment Reporting (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureSegmentReporting</ParentRole>
      <Position>23</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Geographic Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureGeographicInformationTables</Role>
      <ShortName>Geographic Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureGeographicInformation</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>30603 - Disclosure - Inventories (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureInventoriesTables</Role>
      <ShortName>Inventories (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureInventories</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>30703 - Disclosure - Short And Long-Term Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureShortAndLongTermDebtTables</Role>
      <ShortName>Short And Long-Term Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureShortAndLongTermDebt</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>30803 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>30903 - Disclosure - Shareholders' Equity And Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureShareholdersEquityAndStockBasedCompensationTables</Role>
      <ShortName>Shareholders' Equity And Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureShareholdersEquityAndStockBasedCompensation</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>31003 - Disclosure - Income (Loss) Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureIncomeLossPerShareTables</Role>
      <ShortName>Income (Loss) Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>31303 - Disclosure - Revenue By Market (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureRevenueByMarketTables</Role>
      <ShortName>Revenue By Market (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureRevenueByMarket</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>40101 - Disclosure - General (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureGeneralDetails</Role>
      <ShortName>General (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureGeneral</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>40301 - Disclosure - Discontinued Operations (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureDiscontinuedOperationsNarrativeDetails</Role>
      <ShortName>Discontinued Operations (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureDiscontinuedOperationsTables</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>40303 - Disclosure - Discontinued Operations (Schedule Of Discontinued Operations Balance Sheet) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureDiscontinuedOperationsScheduleOfDiscontinuedOperationsBalanceSheetDetails</Role>
      <ShortName>Discontinued Operations (Schedule Of Discontinued Operations Balance Sheet) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureDiscontinuedOperationsTables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>40304 - Disclosure - Discontinued Operations (Summary Of Results Of Discontinued Operations) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureDiscontinuedOperationsSummaryOfResultsOfDiscontinuedOperationsDetails</Role>
      <ShortName>Discontinued Operations (Summary Of Results Of Discontinued Operations) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureDiscontinuedOperationsTables</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>40305 - Disclosure - Discontinued Operations (Schedule Of Loss On Sale Of Discontinued Operations) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureDiscontinuedOperationsScheduleOfLossOnSaleOfDiscontinuedOperationsDetails</Role>
      <ShortName>Discontinued Operations (Schedule Of Loss On Sale Of Discontinued Operations) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureDiscontinuedOperationsTables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>40401 - Disclosure - Segment Reporting (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureSegmentReportingNarrativeDetails</Role>
      <ShortName>Segment Reporting (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureSegmentReportingTables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>40402 - Disclosure - Segment Reporting (Summary Of Data By Industry Segment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureSegmentReportingSummaryOfDataByIndustrySegmentDetails</Role>
      <ShortName>Segment Reporting (Summary Of Data By Industry Segment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureSegmentReportingTables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Geographic Information (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureGeographicInformationNarrativeDetails</Role>
      <ShortName>Geographic Information (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureGeographicInformationTables</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>40502 - Disclosure - Geographic Information (Geographical Distribution Of Long-Lived Assets, Net) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureGeographicInformationGeographicalDistributionOfLongLivedAssetsNetDetails</Role>
      <ShortName>Geographic Information (Geographical Distribution Of Long-Lived Assets, Net) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureGeographicInformationTables</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>40503 - Disclosure - Geographic Information (Geographical Distribution Of Net Sales) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureGeographicInformationGeographicalDistributionOfNetSalesDetails</Role>
      <ShortName>Geographic Information (Geographical Distribution Of Net Sales) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureGeographicInformationTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>40601 - Disclosure - Inventories (Schedule Of Inventories) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureInventoriesScheduleOfInventoriesDetails</Role>
      <ShortName>Inventories (Schedule Of Inventories) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureInventoriesTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Short And Long-Term Debt (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureShortAndLongTermDebtNarrativeDetails</Role>
      <ShortName>Short And Long-Term Debt (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureShortAndLongTermDebtTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40702 - Disclosure - Short And Long-Term Debt (Summary Of Short And Long-Term Debt) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureShortAndLongTermDebtSummaryOfShortAndLongTermDebtDetails</Role>
      <ShortName>Short And Long-Term Debt (Summary Of Short And Long-Term Debt) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureShortAndLongTermDebtTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureIncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureIncomeTaxesTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>40802 - Disclosure - Income Taxes (Income (Loss) Before Income Taxes By Jurisdiction) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureIncomeTaxesIncomeLossBeforeIncomeTaxesByJurisdictionDetails</Role>
      <ShortName>Income Taxes (Income (Loss) Before Income Taxes By Jurisdiction) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureIncomeTaxesTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>40901 - Disclosure - Shareholders' Equity And Stock-Based Compensation (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureShareholdersEquityAndStockBasedCompensationNarrativeDetails</Role>
      <ShortName>Shareholders' Equity And Stock-Based Compensation (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureShareholdersEquityAndStockBasedCompensationTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>40902 - Disclosure - Shareholders' Equity And Stock-Based Compensation (Schedule Of Stock Option Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureShareholdersEquityAndStockBasedCompensationScheduleOfStockOptionActivityDetails</Role>
      <ShortName>Shareholders' Equity And Stock-Based Compensation (Schedule Of Stock Option Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureShareholdersEquityAndStockBasedCompensationTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Income (Loss) Per Share (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureIncomeLossPerShareNarrativeDetails</Role>
      <ShortName>Income (Loss) Per Share (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureIncomeTaxesTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>41002 - Disclosure - Income (Loss) Per Share (Reconciliation Between Basic And Diluted Earnings Per Share) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureIncomeLossPerShareReconciliationBetweenBasicAndDilutedEarningsPerShareDetails</Role>
      <ShortName>Income (Loss) Per Share (Reconciliation Between Basic And Diluted Earnings Per Share) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureIncomeTaxesTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>41101 - Disclosure - Legal Proceedings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureLegalProceedingsDetails</Role>
      <ShortName>Legal Proceedings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureLegalProceedings</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>41201 - Disclosure - Related-Party Transactions (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureRelatedPartyTransactionsDetails</Role>
      <ShortName>Related-Party Transactions (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureRelatedPartyTransactions</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="iin-20170930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Revenue By Market (Schedule Of Net Revenue By Market)(Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.IntriCon.com/role/DisclosureRevenueByMarketScheduleOfNetRevenueByMarketDetails</Role>
      <ShortName>Revenue By Market (Schedule Of Net Revenue By Market)(Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.IntriCon.com/role/DisclosureRevenueByMarketTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>iin-20170930.xml</File>
    <File>iin-20170930.xsd</File>
    <File>iin-20170930_cal.xml</File>
    <File>iin-20170930_def.xml</File>
    <File>iin-20170930_lab.xml</File>
    <File>iin-20170930_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2017-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2014-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2017-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
